convert to podman

* call podman exec instead of using API:
  - build does not support progress
  - run looks like to lack equivalent dockerpty support
* config: use full uri as short names are not supported on
  all OSes (like debian 11)

runon.default.yaml

@@ -21,9 +21,6 @@ debian_base: &debian_base
   binds:
     - /etc/timezone:ro
     - /etc/localtime:ro
-    - /etc/passwd:ro
-    - /etc/group:ro
-    - /etc/shadow:ro
     - "{home}"
   environment:
     - USER
@@ -33,7 +30,7 @@ debian_base: &debian_base
 
 debian9:
   <<: *debian_base
-  image: debian:9
+  image: docker.io/debian:9
   dockerfile:
     - ARG DEBIAN_FRONTEND=noninteractive
     - RUN echo "deb http://archive.debian.org/debian stretch main" > /etc/apt/sources.list
@@ -46,23 +43,24 @@ debian9:
 
 debian10:
   <<: *debian_base
-  image: debian:10
+  image: docker.io/debian:10
 
 debian11:
   <<: *debian_base
-  image: debian:11
+  image: docker.io/debian:11
 
 debian12:
   <<: *debian_base
-  image: debian:12
+  image: docker.io/debian:12
 
 ubuntu20.04:
   <<: *debian_base
-  image: ubuntu:20.04
+  image: docker.io/ubuntu:20.04
 
 ubuntu22.04:
   <<: *debian_base
-  image: ubuntu:22.04
+  image: docker.io/ubuntu:22.04
+
 rh_base: &rh_base
   dockerfile:
     - RUN dnf install -y sudo
@@ -80,9 +78,6 @@ rh_base: &rh_base
   binds:
     - /etc/timezone:ro
     - /etc/localtime:ro
-    - /etc/passwd:ro
-    - /etc/group:ro
-    - /etc/shadow:ro
     - "{home}"
   environment:
     - USER
@@ -93,7 +88,7 @@ rh_base: &rh_base
 
 centos7:
   <<: *rh_base
-  image: centos:7
+  image: docker.io/centos:7
   dockerfile:
     - RUN yum install -y sudo
     - RUN echo "Defaults lecture = never" >> /etc/sudoers
@@ -104,9 +99,9 @@ centos7:
 
 rocky8:
   <<: *rh_base
-  image: rockylinux:8
+  image: docker.io/rockylinux:8
 
 rocky9:
   <<: *rh_base
-  image: rockylinux:9
+  image: docker.io/rockylinux:9
 

runon/runon.py

@@ -1,13 +1,8 @@
 import sys
+import os
 import argparse
-import docker
-import dockerpty
-import io
 import getpass
 import pathlib
-import platform
-import os
-import re
 import xdg.BaseDirectory
 import yaml
 import datetime
@@ -80,16 +75,10 @@ def make_osname_link(binpath, osname):
     except FileExistsError:
         pass
 
-def make_image_name(osname):
-    user = getpass.getuser()
-    name = 'runon-{}-{}'.format(osname, user)
-    return name
 
-
-def build_image(client, conf, update, verbose):
+def build_image(conf, update, verbose):
     osname = conf.get('osname')
     image_name = 'runon-{}'.format(osname)
-    tag = make_image_name(conf['osname'])
     cache_dir = os.path.join(xdg.BaseDirectory.xdg_cache_home, 'runon')
     cache_file = os.path.join(cache_dir, image_name)
 
@@ -102,28 +91,32 @@ def build_image(client, conf, update, verbose):
         if ts_image and ts_image > ts_conf:
             if verbose:
                 print('image: {} up-to-date'.format(image_name))
-            image = client.images.get(tag)
-            return image
+            return image_name
 
     image = conf.get('image')
-    packages = conf['packages']
-    dockerfile = conf['dockerfile']
-    pkginstall = conf['pkginstall']
+    dockerfile = conf.get('dockerfile')
+    pkginstall = conf.get('pkginstall')
+    packages = conf.get('packages')
+    if not dockerfile:
+        dockerfile = []
     if image:
         dockerfile.insert(0, 'FROM {}'.format(image))
+    if packages:
         for p in packages:
             dockerfile.append(pkginstall.format(p))
-    try:
+
     if verbose:
-            print('Building image {} ...'.format(tag))
-        cmd = ['docker', 'build']
+        print('Dockerfile:')
+        for l in dockerfile:
+            print(' * {}'.format(l))
+        print('Building image {} ...'.format(image_name))
+    cmd = ['podman', 'build']
     if update:
         cmd.append('--no-cache')
-        cmd += ['-t', tag, '-']
+    cmd += ['-t', image_name, '-']
     ret = subprocess.run(cmd,
                          input='\n'.join(dockerfile).encode('utf-8'),
                          stderr=subprocess.STDOUT, check=True)
-        image = client.images.get(tag)
 
     if not os.path.exists(cache_dir):
         os.mkdir(cache_dir)
@@ -132,19 +125,14 @@ def build_image(client, conf, update, verbose):
             print('cache: {}'.format(cache_file))
         file.write('')
 
-    except (docker.errors.BuildError, KeyboardInterrupt, subprocess.CalledProcessError, docker.errors.ImageNotFound) as e:
-        print('Build Error: {}'.format(e))
-        print()
-        print('with dockerfile:')
-        for line in dockerfile:
-            print('  {}'.format(line))
-        sys.exit(1)
-    return image
+    return image_name
 
 
-def create_container(client, image, conf, command, verbose):
-    volumes = {}
+def run_image(name, conf, command, verbose):
+    volumes = {
+            }
     environment = {}
+    if conf.get('binds'):
         for mnt in conf['binds']:
             mnt = mnt.split(':')
             if mnt[-1] in ['ro','rw']:
@@ -155,39 +143,28 @@ def create_container(client, image, conf, command, verbose):
             mnt = mnt[:2]
             bind = mnt[-1]
             vol = mnt[0]
+            if os.path.exists(vol):
                 volumes[vol] = { 'bind': bind, 'mode': mode }
-    hostname = platform.node()
+    if conf.get('environment'):
         for v in conf['environment']:
             e = v.split('=')
             if len(e) == 1:
                 e.append(os.getenv(e[0]))
             environment[e[0]] = e[1]
-    #environment['debian_chroot']=conf['osname']
-    user='{}:{}'.format(os.getuid(), os.getgid())
-    pwd=os.getcwd()
 
-    container = client.containers.create(image, command,
-                                         detach=False, stdin_open=True, tty=True,
-                                         auto_remove=True,
-                                         hostname=hostname,
-                                         volumes=volumes,
-                                         environment=environment,
-                                         user=user,
-                                         network_mode='host',
-                                         working_dir=pwd
-                                         )
-    return container
-
-
-def run_container(client, container):
-    try:
-        dockerpty.start(client.api, container.id)
-        container.reload()  # to update attrs fields
-    except docker.errors.APIError as e:
-        print('ERROR: {}'.format(e))
-        sys.exit(1)
-    ret = container.attrs['State']['ExitCode']
-    return ret
+    cmd = ['podman', 'run', '--rm', '--interactive', '--tty', '--userns=keep-id', '--net=host' ]
+    for e in environment:
+        cmd += [ '-e', '{}={}'.format(e, environment[e]) ]
+    for v in volumes:
+        cmd += [ '-v', ':'.join([v, volumes[v]['bind'], volumes[v]['mode']]) ]
+    cmd += [ '--workdir', os.getcwd() ]
+    cmd += [ name ]
+    if command:
+        cmd += command
+    if verbose:
+        print('executing: {}\n'.format(' '.join(cmd)))
+    ret = subprocess.run(cmd)
+    return ret.returncode
 
 
 def main():
@@ -247,10 +224,7 @@ def main():
         make_osname_link(sys.argv[0], args.osname)
 
     conf = load_config(conf_file, args.osname)
-
-    client = docker.from_env()
-    image = build_image(client, conf, args.update, args.verbose)
-    container = create_container(client, image, conf, args.command, args.verbose)
-    ret = run_container(client, container)
+    image_name = build_image(conf, args.update, args.verbose)
+    ret = run_image(image_name, conf, args.command, args.verbose)
     return ret
 

setup.py

@@ -9,8 +9,6 @@ setup(
     packages = find_packages(),
     python_requires = ">=3.6",
     install_requires = [
-        "docker",
-        "dockerpty",
         "pathlib",
         "pyxdg",
         "pyyaml",